Bamboo Leaf (True Zhu Ye)

Traditional Use

Primary Actions

• Clears Heat and relieves irritability - used for Heart and Stomach heat, post-febrile restlessness, vexation, and lingering low-grade fever when a light, non-harsh cooling herb is preferred.
• Generates fluids and alleviates thirst - classically chosen for heat-damaged fluids with dry mouth, excessive thirst, and residual fever after the acute phase of illness has passed.
• Promotes urination and drains Heart heat via the Small Intestine - used for mouth sores, dark scanty painful urine, and Heart-fire patterns where heat must be guided downward and out through urination.
• Clears upper-burner and summerheat conditions - especially useful in warm-disease patterns, pediatric heat agitation, or mild phlegm-heat in the chest when the goal is to cool without over-draining.

Secondary Actions

• Compared with Dan Zhu Ye, true Zhu Ye is less strongly diuretic but better at clearing upper-body irritability and generating fluids for weakened post-fever patients.
• Fresh leaves and the rolled young leaf-heart form are preferred when a lighter, more aromatic clearing effect is needed in warm-disease formulas.

Classic Formulas

• Zhu Ye Shi Gao Tang (竹叶石膏汤) - from Shang Han Lun, where Zhu Ye and Shi Gao clear lingering post-febrile heat while Ren Shen and Mai Men Dong restore depleted Qi and fluids.
• Dao Chi San (导赤散) - from Xiao Er Yao Zheng Zhi Jue, using bamboo leaf with Mu Tong, Sheng Di Huang, and Gan Cao to drain Heart fire through the Small Intestine for mouth sores and painful dark urine.
• Qing Ying Tang (清营汤) - warm-disease formula in which Zhu Ye Juan Xin helps redirect heat outward from the Ying level while relieving irritability and protecting fluids.
• Qing Gong Tang (清宫汤) - classic Pericardium-heat formula where bamboo leaf heart supports clearing agitation and upper-burner heat without excessive bitterness.

Classical References

• DISTINCTION NOTE: This record is for true Zhu Ye (竹叶), the leaf of bamboo, not Dan Zhu Ye (淡竹叶, Lophatherum gracile). Classical sources before the Ming dynasty used 'Zhu Ye' to mean actual bamboo leaf; later pharmacy practice often substituted Lophatherum, so this distinction must be made explicit.
• Shen Nong Ben Cao Jing records bamboo leaf for cough with rebellious upward Qi and later traditions expanded its use to phlegm-Heat in the chest, thirst, irritability, and mouth sores.
• Ben Cao Zheng and related later texts describe Zhu Ye as relieving deficiency-Heat irritability and insomnia, generating fluids, promoting urination, relieving throat obstruction, and calming pediatric wind-Heat convulsions.